tile Biologij of so)ne British Neuroptera. 545 



blotches per segment, each blotch is anteriorly broad, extending down 

 the sides, posteriorly narrowing and interrupted from the correspond- 

 ing blotch of the next segment. The sclerites of meso- and meta- 

 thorax are small, rounded and blackish. The abdomen is similarly 

 marked to the meso- and metathorax, but has, in addition, a lateral 

 brown, sunken line belovv' the spiracles. Anteriorly in each segment 

 the latero-dorsal blotch extends down to this line. There is also 

 a dark median dorsal line running" the greater part of the length 

 of the body. Ventrally the colour is brownish-Avhite. The legs 

 are dark fuscous. 



There should be no difficulty in identifying a larva of 

 B. concinna since, although variable, both head and body 

 markings are peculiar to this species ( ? also to qaadri- 

 fasciata). 



For pupation a very coarsely reticulate, distinctly yellow- 

 ish cocoon, about 6 mm. long, is spun between pine needles, 

 or in crevices of the bark. The cocoon is quite different 

 from that of any other of our British Hemerobiids, being 

 coarse and stiff to the touch. Five or six days after spin- 

 ning (65°-70° F.), the pupa is disclosed. This is brov."n 

 in colour, the back yellow, with transverse brown bands. 

 Wings and body darken, and emergence takes place in 

 from eleven (70° F.) to fourteen (63° F.) days. Such is the 

 case in May and June. 



The imagines are carnivorous, and in captivity will 

 sometimes devour one another if other food is lacking. In 

 no case has a pairing been obtained in cages, the final result 

 after some days often being the destruction of the male 

 by the female. The larvae feed on aphids, etc., on pines, 

 but will always accept other aphids in the place of their 

 na^tural food. 



Boriomyia quadrlfasciata Reuter. 



Wing expanse 18-23 mm. Very like concinna in venation and 

 general facies, but the colour is grey as against the ochreous- brown 

 of co7icinna. The fore-wings are more peppered with blackish, 

 and there are four more or less distinct dark fuscous, transverse 

 fasciae. 



Once thought to be a variety of concinna, this form 

 occurs together with the latter on conifers, but is generally 

 not so abundant in the south of England. In appearance 

 the majority of quadrifasciafa are totally diflerent from 



